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private void Form1_Load(object sender, EventArgs e)
        {
            try
            {
                byte[] address = { 127, 0, 0, 1 };
                IPAddress adr1 = new IPAddress(address);
                TcpListener listener = new TcpListener(adr1, 4711);
                listener.Start();
                Thread th = new Thread(new ThreadStart(Run));
                th.Start();
            }
            catch (Exception fehler) { }  
        }                    

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 private void button1_Click(object sender, EventArgs e)  //Button Verbinden
        {
            TcpClient c = new TcpClient("localhost", 4711);

        }